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Diffstat (limited to '')
-rw-r--r-- | sandbox/mcombellack/ohloh/tags/test/src/main/java/org/apache/tuscany/sca/core/invocation/JDKProxyFactory.java | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/sandbox/mcombellack/ohloh/tags/test/src/main/java/org/apache/tuscany/sca/core/invocation/JDKProxyFactory.java b/sandbox/mcombellack/ohloh/tags/test/src/main/java/org/apache/tuscany/sca/core/invocation/JDKProxyFactory.java new file mode 100644 index 0000000000..0992638318 --- /dev/null +++ b/sandbox/mcombellack/ohloh/tags/test/src/main/java/org/apache/tuscany/sca/core/invocation/JDKProxyFactory.java @@ -0,0 +1,103 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.tuscany.sca.core.invocation; + +import java.lang.reflect.InvocationHandler; +import java.lang.reflect.Proxy; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.List; + +import org.apache.tuscany.sca.core.context.CallableReferenceImpl; +import org.apache.tuscany.sca.core.context.ServiceReferenceImpl; +import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper; +import org.apache.tuscany.sca.invocation.MessageFactory; +import org.apache.tuscany.sca.runtime.RuntimeWire; +import org.osoa.sca.CallableReference; +import org.osoa.sca.ServiceReference; + +/** + * the default implementation of a wire service that uses JDK dynamic proxies + * + * @version $Rev$ $Date$ + */ +public class JDKProxyFactory implements ProxyFactory { + protected InterfaceContractMapper contractMapper; + private MessageFactory messageFactory; + + public JDKProxyFactory(MessageFactory messageFactory, InterfaceContractMapper mapper) { + this.contractMapper = mapper; + this.messageFactory = messageFactory; + } + + /** + * The original createProxy method assumes that the proxy doesn't want to + * share conversation state so sets the conversation object to null + */ + public <T> T createProxy(Class<T> interfaze, RuntimeWire wire) throws ProxyCreationException { + ServiceReference<T> serviceReference = new ServiceReferenceImpl(interfaze, wire, this); + return createProxy(serviceReference); + } + + public <T> T createProxy(CallableReference<T> callableReference) throws ProxyCreationException { + assert callableReference != null; + final Class<T> interfaze = callableReference.getBusinessInterface(); + InvocationHandler handler = new JDKInvocationHandler(messageFactory, callableReference); + // Allow privileged access to class loader. Requires RuntimePermission in security policy. + ClassLoader cl = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() { + public ClassLoader run() { + return interfaze.getClassLoader(); + } + }); + Object proxy = Proxy.newProxyInstance(cl, new Class[] {interfaze}, handler); + ((CallableReferenceImpl)callableReference).setProxy(proxy); + return interfaze.cast(proxy); + } + + public <T> T createCallbackProxy(Class<T> interfaze, List<RuntimeWire> wires) throws ProxyCreationException { + CallbackReferenceImpl<T> callbackReference = CallbackReferenceImpl.newInstance(interfaze, this, wires); + return callbackReference != null ? createCallbackProxy(callbackReference) : null; + } + + public <T> T createCallbackProxy(CallbackReferenceImpl<T> callbackReference) throws ProxyCreationException { + assert callbackReference != null; + Class<T> interfaze = callbackReference.getBusinessInterface(); + InvocationHandler handler = new JDKCallbackInvocationHandler(messageFactory, callbackReference); + ClassLoader cl = interfaze.getClassLoader(); + Object proxy = Proxy.newProxyInstance(cl, new Class[] {interfaze}, handler); + callbackReference.setProxy(proxy); + return interfaze.cast(proxy); + } + + public <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException { + InvocationHandler handler = Proxy.getInvocationHandler(target); + if (handler instanceof JDKInvocationHandler) { + return (R)((JDKInvocationHandler)handler).getCallableReference(); + } else { + throw new IllegalArgumentException("The object is not a known proxy."); + } + } + + /** + * @see org.apache.tuscany.sca.core.invocation.ProxyFactory#isProxyClass(java.lang.Class) + */ + public boolean isProxyClass(Class<?> clazz) { + return Proxy.isProxyClass(clazz); + } +} |